I use an open toe foot for most FMQ. I do this because I learned reading Leah Day's blog, and that is what she recommended. I used to have a plastic one for my kenmore, but now I have a metal one on my Bernina. I don't like it as much, because the skinny metal prongs will sometimes catch a long thread (oops) and I have to pick out and redo that area. However, I have accidentally folded my quilt over the closed darning foot, and sewing the quilt to the foot is a mistake that is tough to pick out- it took me forever to ensure I wouldn't tear the quilt.
Glad you found what will work for you!